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<div id="overview"><a href="../../../../../apidocs/org/goda/time/convert/ConverterSet.html">View Javadoc</a></div><pre>

<a name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a name="2" href="#2">2</a>   <em class="jxr_comment"> *  Copyright 2001-2005 Stephen Colebourne</em>
<a name="3" href="#3">3</a>   <em class="jxr_comment"> *</em>
<a name="4" href="#4">4</a>   <em class="jxr_comment"> *  Licensed under the Apache License, Version 2.0 (the "License");</em>
<a name="5" href="#5">5</a>   <em class="jxr_comment"> *  you may not use this file except in compliance with the License.</em>
<a name="6" href="#6">6</a>   <em class="jxr_comment"> *  You may obtain a copy of the License at</em>
<a name="7" href="#7">7</a>   <em class="jxr_comment"> *</em>
<a name="8" href="#8">8</a>   <em class="jxr_comment"> *      <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a name="9" href="#9">9</a>   <em class="jxr_comment"> *</em>
<a name="10" href="#10">10</a>  <em class="jxr_comment"> *  Unless required by applicable law or agreed to in writing, software</em>
<a name="11" href="#11">11</a>  <em class="jxr_comment"> *  distributed under the License is distributed on an "AS IS" BASIS,</em>
<a name="12" href="#12">12</a>  <em class="jxr_comment"> *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</em>
<a name="13" href="#13">13</a>  <em class="jxr_comment"> *  See the License for the specific language governing permissions and</em>
<a name="14" href="#14">14</a>  <em class="jxr_comment"> *  limitations under the License.</em>
<a name="15" href="#15">15</a>  <em class="jxr_comment"> */</em>
<a name="16" href="#16">16</a>  <strong class="jxr_keyword">package</strong> org.goda.time.convert;
<a name="17" href="#17">17</a>  
<a name="18" href="#18">18</a>  <em class="jxr_javadoccomment">/**</em>
<a name="19" href="#19">19</a>  <em class="jxr_javadoccomment"> * A set of converters, which allows exact converters to be quickly</em>
<a name="20" href="#20">20</a>  <em class="jxr_javadoccomment"> * selected. This class is threadsafe because it is (essentially) immutable.</em>
<a name="21" href="#21">21</a>  <em class="jxr_javadoccomment"> *</em>
<a name="22" href="#22">22</a>  <em class="jxr_javadoccomment"> * @author Brian S O'Neill</em>
<a name="23" href="#23">23</a>  <em class="jxr_javadoccomment"> * @since 1.0</em>
<a name="24" href="#24">24</a>  <em class="jxr_javadoccomment"> */</em>
<a name="25" href="#25">25</a>  <strong class="jxr_keyword">class</strong> <a href="../../../../org/goda/time/convert/ConverterSet.html">ConverterSet</a> {
<a name="26" href="#26">26</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../org/goda/time/convert/Converter.html">Converter</a>[] iConverters;
<a name="27" href="#27">27</a>  
<a name="28" href="#28">28</a>      <em class="jxr_comment">// A simple immutable hashtable: closed hashing, linear probing, sized</em>
<a name="29" href="#29">29</a>      <em class="jxr_comment">// power of 2, at least one null slot.</em>
<a name="30" href="#30">30</a>      <strong class="jxr_keyword">private</strong> <a href="../../../../org/goda/time/convert/ConverterSet.html">Entry</a>[] iSelectEntries;
<a name="31" href="#31">31</a>  
<a name="32" href="#32">32</a>      <a href="../../../../org/goda/time/convert/ConverterSet.html">ConverterSet</a>(<a href="../../../../org/goda/time/convert/Converter.html">Converter</a>[] converters) {
<a name="33" href="#33">33</a>          <em class="jxr_comment">// Since this is a package private constructor, we trust ourselves not</em>
<a name="34" href="#34">34</a>          <em class="jxr_comment">// to alter the array outside this class.</em>
<a name="35" href="#35">35</a>          iConverters = converters;
<a name="36" href="#36">36</a>          iSelectEntries = <strong class="jxr_keyword">new</strong> <a href="../../../../org/goda/time/convert/ConverterSet.html">Entry</a>[1 &lt;&lt; 4]; <em class="jxr_comment">// 16</em>
<a name="37" href="#37">37</a>      }
<a name="38" href="#38">38</a>  
<a name="39" href="#39">39</a>      <em class="jxr_javadoccomment">/**</em>
<a name="40" href="#40">40</a>  <em class="jxr_javadoccomment">     * Returns the closest matching converter for the given type, or null if</em>
<a name="41" href="#41">41</a>  <em class="jxr_javadoccomment">     * none found.</em>
<a name="42" href="#42">42</a>  <em class="jxr_javadoccomment">     *</em>
<a name="43" href="#43">43</a>  <em class="jxr_javadoccomment">     * @param type type to select, which may be null</em>
<a name="44" href="#44">44</a>  <em class="jxr_javadoccomment">     * @throws IllegalStateException if multiple converters match the type</em>
<a name="45" href="#45">45</a>  <em class="jxr_javadoccomment">     * equally well</em>
<a name="46" href="#46">46</a>  <em class="jxr_javadoccomment">     */</em>
<a name="47" href="#47">47</a>      <a href="../../../../org/goda/time/convert/Converter.html">Converter</a> select(Class type) <strong class="jxr_keyword">throws</strong> IllegalStateException {
<a name="48" href="#48">48</a>          <em class="jxr_comment">// Check the hashtable first.</em>
<a name="49" href="#49">49</a>          <a href="../../../../org/goda/time/convert/ConverterSet.html">Entry</a>[] entries = iSelectEntries;
<a name="50" href="#50">50</a>          <strong class="jxr_keyword">int</strong> length = entries.length;
<a name="51" href="#51">51</a>          <strong class="jxr_keyword">int</strong> index = type == <strong class="jxr_keyword">null</strong> ? 0 : type.hashCode() &amp; (length - 1);
<a name="52" href="#52">52</a>  
<a name="53" href="#53">53</a>          <a href="../../../../org/goda/time/convert/ConverterSet.html">Entry</a> e;
<a name="54" href="#54">54</a>          <em class="jxr_comment">// This loop depends on there being at least one null slot.</em>
<a name="55" href="#55">55</a>          <strong class="jxr_keyword">while</strong> ((e = entries[index]) != <strong class="jxr_keyword">null</strong>) {
<a name="56" href="#56">56</a>              <strong class="jxr_keyword">if</strong> (e.iType == type) {
<a name="57" href="#57">57</a>                  <strong class="jxr_keyword">return</strong> e.iConverter;
<a name="58" href="#58">58</a>              }
<a name="59" href="#59">59</a>              <strong class="jxr_keyword">if</strong> (++index &gt;= length) {
<a name="60" href="#60">60</a>                  index = 0;
<a name="61" href="#61">61</a>              }
<a name="62" href="#62">62</a>          }
<a name="63" href="#63">63</a>  
<a name="64" href="#64">64</a>          <em class="jxr_comment">// Not found in the hashtable, so do actual work.</em>
<a name="65" href="#65">65</a>  
<a name="66" href="#66">66</a>          <a href="../../../../org/goda/time/convert/Converter.html">Converter</a> converter = selectSlow(<strong class="jxr_keyword">this</strong>, type);
<a name="67" href="#67">67</a>          e = <strong class="jxr_keyword">new</strong> <a href="../../../../org/goda/time/convert/ConverterSet.html">Entry</a>(type, converter);
<a name="68" href="#68">68</a>  
<a name="69" href="#69">69</a>          <em class="jxr_comment">// Save the entry for future selects. This class must be threadsafe,</em>
<a name="70" href="#70">70</a>          <em class="jxr_comment">// but there is no synchronization. Since the hashtable is being used</em>
<a name="71" href="#71">71</a>          <em class="jxr_comment">// as a cache, it is okay to destroy existing entries. This isn't</em>
<a name="72" href="#72">72</a>          <em class="jxr_comment">// likely to occur unless there is a high amount of concurrency. As</em>
<a name="73" href="#73">73</a>          <em class="jxr_comment">// time goes on, cache updates will occur less often, and the cache</em>
<a name="74" href="#74">74</a>          <em class="jxr_comment">// will fill with all the necessary entries.</em>
<a name="75" href="#75">75</a>  
<a name="76" href="#76">76</a>          <em class="jxr_comment">// Do all updates on a copy: slots in iSelectEntries must not be</em>
<a name="77" href="#77">77</a>          <em class="jxr_comment">// updated by multiple threads as this can allow all null slots to be</em>
<a name="78" href="#78">78</a>          <em class="jxr_comment">// consumed.</em>
<a name="79" href="#79">79</a>          <a href="../../../../org/goda/time/convert/ConverterSet.html">Entry</a>[] newEnts = <strong class="jxr_keyword">new</strong> <a href="../../../../org/goda/time/convert/ConverterSet.html">Entry</a>[entries.length];
<a name="80" href="#80">80</a>          <strong class="jxr_keyword">for</strong>(<strong class="jxr_keyword">int</strong> i=0; i &lt; entries.length; i++ ){
<a name="81" href="#81">81</a>              newEnts[i] = entries[i];
<a name="82" href="#82">82</a>          }
<a name="83" href="#83">83</a>          entries = newEnts;
<a name="84" href="#84">84</a>  
<a name="85" href="#85">85</a>          <em class="jxr_comment">// Add new entry.</em>
<a name="86" href="#86">86</a>          entries[index] = e;
<a name="87" href="#87">87</a>  
<a name="88" href="#88">88</a>          <em class="jxr_comment">// Verify that at least one null slot exists!</em>
<a name="89" href="#89">89</a>          <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i=0; i&lt;length; i++) {
<a name="90" href="#90">90</a>              <strong class="jxr_keyword">if</strong> (entries[i] == <strong class="jxr_keyword">null</strong>) {
<a name="91" href="#91">91</a>                  <em class="jxr_comment">// Found a null slot, swap in new hashtable.</em>
<a name="92" href="#92">92</a>                  iSelectEntries = entries;
<a name="93" href="#93">93</a>                  <strong class="jxr_keyword">return</strong> converter;
<a name="94" href="#94">94</a>              }
<a name="95" href="#95">95</a>          }
<a name="96" href="#96">96</a>  
<a name="97" href="#97">97</a>          <em class="jxr_comment">// Double capacity and re-hash.</em>
<a name="98" href="#98">98</a>  
<a name="99" href="#99">99</a>          <strong class="jxr_keyword">int</strong> newLength = length &lt;&lt; 1;
<a name="100" href="#100">100</a>         <a href="../../../../org/goda/time/convert/ConverterSet.html">Entry</a>[] newEntries = <strong class="jxr_keyword">new</strong> <a href="../../../../org/goda/time/convert/ConverterSet.html">Entry</a>[newLength];
<a name="101" href="#101">101</a>         <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i=0; i&lt;length; i++) {
<a name="102" href="#102">102</a>             e = entries[i];
<a name="103" href="#103">103</a>             type = e.iType;
<a name="104" href="#104">104</a>             index = type == <strong class="jxr_keyword">null</strong> ? 0 : type.hashCode() &amp; (newLength - 1);
<a name="105" href="#105">105</a>             <strong class="jxr_keyword">while</strong> (newEntries[index] != <strong class="jxr_keyword">null</strong>) {
<a name="106" href="#106">106</a>                 <strong class="jxr_keyword">if</strong> (++index &gt;= newLength) {
<a name="107" href="#107">107</a>                     index = 0;
<a name="108" href="#108">108</a>                 }
<a name="109" href="#109">109</a>             }
<a name="110" href="#110">110</a>             newEntries[index] = e;
<a name="111" href="#111">111</a>         }
<a name="112" href="#112">112</a> 
<a name="113" href="#113">113</a>         <em class="jxr_comment">// Swap in new hashtable.</em>
<a name="114" href="#114">114</a>         iSelectEntries = newEntries;
<a name="115" href="#115">115</a>         <strong class="jxr_keyword">return</strong> converter;
<a name="116" href="#116">116</a>     }
<a name="117" href="#117">117</a> 
<a name="118" href="#118">118</a>     <em class="jxr_javadoccomment">/**</em>
<a name="119" href="#119">119</a> <em class="jxr_javadoccomment">     * Returns the amount of converters in the set.</em>
<a name="120" href="#120">120</a> <em class="jxr_javadoccomment">     */</em>
<a name="121" href="#121">121</a>     <strong class="jxr_keyword">int</strong> size() {
<a name="122" href="#122">122</a>         <strong class="jxr_keyword">return</strong> iConverters.length;
<a name="123" href="#123">123</a>     }
<a name="124" href="#124">124</a> 
<a name="125" href="#125">125</a>     <em class="jxr_javadoccomment">/**</em>
<a name="126" href="#126">126</a> <em class="jxr_javadoccomment">     * Copies all the converters in the set to the given array.</em>
<a name="127" href="#127">127</a> <em class="jxr_javadoccomment">     */</em>
<a name="128" href="#128">128</a>     <strong class="jxr_keyword">void</strong> copyInto(<a href="../../../../org/goda/time/convert/Converter.html">Converter</a>[] converters) {
<a name="129" href="#129">129</a>         System.arraycopy(iConverters, 0, converters, 0, iConverters.length);
<a name="130" href="#130">130</a>     }
<a name="131" href="#131">131</a> 
<a name="132" href="#132">132</a>     <em class="jxr_javadoccomment">/**</em>
<a name="133" href="#133">133</a> <em class="jxr_javadoccomment">     * Returns a copy of this set, with the given converter added. If a</em>
<a name="134" href="#134">134</a> <em class="jxr_javadoccomment">     * matching converter is already in the set, the given converter replaces</em>
<a name="135" href="#135">135</a> <em class="jxr_javadoccomment">     * it. If the converter is exactly the same as one already in the set, the</em>
<a name="136" href="#136">136</a> <em class="jxr_javadoccomment">     * original set is returned.</em>
<a name="137" href="#137">137</a> <em class="jxr_javadoccomment">     *</em>
<a name="138" href="#138">138</a> <em class="jxr_javadoccomment">     * @param converter  converter to add, must not be null</em>
<a name="139" href="#139">139</a> <em class="jxr_javadoccomment">     * @param removed  if not null, element 0 is set to the removed converter</em>
<a name="140" href="#140">140</a> <em class="jxr_javadoccomment">     * @throws NullPointerException if converter is null</em>
<a name="141" href="#141">141</a> <em class="jxr_javadoccomment">     */</em>
<a name="142" href="#142">142</a>     <a href="../../../../org/goda/time/convert/ConverterSet.html">ConverterSet</a> add(<a href="../../../../org/goda/time/convert/Converter.html">Converter</a> converter, <a href="../../../../org/goda/time/convert/Converter.html">Converter</a>[] removed) {
<a name="143" href="#143">143</a>         <a href="../../../../org/goda/time/convert/Converter.html">Converter</a>[] converters = iConverters;
<a name="144" href="#144">144</a>         <strong class="jxr_keyword">int</strong> length = converters.length;
<a name="145" href="#145">145</a> 
<a name="146" href="#146">146</a>         <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i=0; i&lt;length; i++) {
<a name="147" href="#147">147</a>             <a href="../../../../org/goda/time/convert/Converter.html">Converter</a> existing = converters[i];
<a name="148" href="#148">148</a>             <strong class="jxr_keyword">if</strong> (converter.equals(existing)) {
<a name="149" href="#149">149</a>                 <em class="jxr_comment">// Already in the set.</em>
<a name="150" href="#150">150</a>                 <strong class="jxr_keyword">if</strong> (removed != <strong class="jxr_keyword">null</strong>) {
<a name="151" href="#151">151</a>                     removed[0] = <strong class="jxr_keyword">null</strong>;
<a name="152" href="#152">152</a>                 }
<a name="153" href="#153">153</a>                 <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>;
<a name="154" href="#154">154</a>             }
<a name="155" href="#155">155</a>             
<a name="156" href="#156">156</a>             <strong class="jxr_keyword">if</strong> (converter.getSupportedType() == existing.getSupportedType()) {
<a name="157" href="#157">157</a>                 <em class="jxr_comment">// Replace the converter.</em>
<a name="158" href="#158">158</a>                 <a href="../../../../org/goda/time/convert/Converter.html">Converter</a>[] copy = <strong class="jxr_keyword">new</strong> <a href="../../../../org/goda/time/convert/Converter.html">Converter</a>[length];
<a name="159" href="#159">159</a>                     
<a name="160" href="#160">160</a>                 <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> j=0; j&lt;length; j++) {
<a name="161" href="#161">161</a>                     <strong class="jxr_keyword">if</strong> (j != i) {
<a name="162" href="#162">162</a>                         copy[j] = converters[j];
<a name="163" href="#163">163</a>                     } <strong class="jxr_keyword">else</strong> {
<a name="164" href="#164">164</a>                         copy[j] = converter;
<a name="165" href="#165">165</a>                     }
<a name="166" href="#166">166</a>                 }
<a name="167" href="#167">167</a> 
<a name="168" href="#168">168</a>                 <strong class="jxr_keyword">if</strong> (removed != <strong class="jxr_keyword">null</strong>) {
<a name="169" href="#169">169</a>                     removed[0] = existing;
<a name="170" href="#170">170</a>                 }
<a name="171" href="#171">171</a>                 <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../org/goda/time/convert/ConverterSet.html">ConverterSet</a>(copy);
<a name="172" href="#172">172</a>             }
<a name="173" href="#173">173</a>         }
<a name="174" href="#174">174</a> 
<a name="175" href="#175">175</a>         <em class="jxr_comment">// Not found, so add it.</em>
<a name="176" href="#176">176</a>         <a href="../../../../org/goda/time/convert/Converter.html">Converter</a>[] copy = <strong class="jxr_keyword">new</strong> <a href="../../../../org/goda/time/convert/Converter.html">Converter</a>[length + 1];
<a name="177" href="#177">177</a>         System.arraycopy(converters, 0, copy, 0, length);
<a name="178" href="#178">178</a>         copy[length] = converter;
<a name="179" href="#179">179</a>         
<a name="180" href="#180">180</a>         <strong class="jxr_keyword">if</strong> (removed != <strong class="jxr_keyword">null</strong>) {
<a name="181" href="#181">181</a>             removed[0] = <strong class="jxr_keyword">null</strong>;
<a name="182" href="#182">182</a>         }
<a name="183" href="#183">183</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../org/goda/time/convert/ConverterSet.html">ConverterSet</a>(copy);
<a name="184" href="#184">184</a>     }
<a name="185" href="#185">185</a> 
<a name="186" href="#186">186</a>     <em class="jxr_javadoccomment">/**</em>
<a name="187" href="#187">187</a> <em class="jxr_javadoccomment">     * Returns a copy of this set, with the given converter removed. If the</em>
<a name="188" href="#188">188</a> <em class="jxr_javadoccomment">     * converter was not in the set, the original set is returned.</em>
<a name="189" href="#189">189</a> <em class="jxr_javadoccomment">     *</em>
<a name="190" href="#190">190</a> <em class="jxr_javadoccomment">     * @param converter  converter to remove, must not be null</em>
<a name="191" href="#191">191</a> <em class="jxr_javadoccomment">     * @param removed  if not null, element 0 is set to the removed converter</em>
<a name="192" href="#192">192</a> <em class="jxr_javadoccomment">     * @throws NullPointerException if converter is null</em>
<a name="193" href="#193">193</a> <em class="jxr_javadoccomment">     */</em>
<a name="194" href="#194">194</a>     <a href="../../../../org/goda/time/convert/ConverterSet.html">ConverterSet</a> remove(<a href="../../../../org/goda/time/convert/Converter.html">Converter</a> converter, <a href="../../../../org/goda/time/convert/Converter.html">Converter</a>[] removed) {
<a name="195" href="#195">195</a>         <a href="../../../../org/goda/time/convert/Converter.html">Converter</a>[] converters = iConverters;
<a name="196" href="#196">196</a>         <strong class="jxr_keyword">int</strong> length = converters.length;
<a name="197" href="#197">197</a> 
<a name="198" href="#198">198</a>         <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i=0; i&lt;length; i++) {
<a name="199" href="#199">199</a>             <strong class="jxr_keyword">if</strong> (converter.equals(converters[i])) {
<a name="200" href="#200">200</a>                 <strong class="jxr_keyword">return</strong> remove(i, removed);
<a name="201" href="#201">201</a>             }
<a name="202" href="#202">202</a>         }
<a name="203" href="#203">203</a> 
<a name="204" href="#204">204</a>         <em class="jxr_comment">// Not found.</em>
<a name="205" href="#205">205</a>         <strong class="jxr_keyword">if</strong> (removed != <strong class="jxr_keyword">null</strong>) {
<a name="206" href="#206">206</a>             removed[0] = <strong class="jxr_keyword">null</strong>;
<a name="207" href="#207">207</a>         }
<a name="208" href="#208">208</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>;
<a name="209" href="#209">209</a>     }
<a name="210" href="#210">210</a> 
<a name="211" href="#211">211</a>     <em class="jxr_javadoccomment">/**</em>
<a name="212" href="#212">212</a> <em class="jxr_javadoccomment">     * Returns a copy of this set, with the converter at the given index</em>
<a name="213" href="#213">213</a> <em class="jxr_javadoccomment">     * removed.</em>
<a name="214" href="#214">214</a> <em class="jxr_javadoccomment">     *</em>
<a name="215" href="#215">215</a> <em class="jxr_javadoccomment">     * @param index index of converter to remove</em>
<a name="216" href="#216">216</a> <em class="jxr_javadoccomment">     * @param removed if not null, element 0 is set to the removed converter</em>
<a name="217" href="#217">217</a> <em class="jxr_javadoccomment">     * @throws IndexOutOfBoundsException if the index is invalid</em>
<a name="218" href="#218">218</a> <em class="jxr_javadoccomment">     */</em>
<a name="219" href="#219">219</a>     <a href="../../../../org/goda/time/convert/ConverterSet.html">ConverterSet</a> remove(<strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> index, <a href="../../../../org/goda/time/convert/Converter.html">Converter</a>[] removed) {
<a name="220" href="#220">220</a>         <a href="../../../../org/goda/time/convert/Converter.html">Converter</a>[] converters = iConverters;
<a name="221" href="#221">221</a>         <strong class="jxr_keyword">int</strong> length = converters.length;
<a name="222" href="#222">222</a>         <strong class="jxr_keyword">if</strong> (index &gt;= length) {
<a name="223" href="#223">223</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IndexOutOfBoundsException();
<a name="224" href="#224">224</a>         }
<a name="225" href="#225">225</a> 
<a name="226" href="#226">226</a>         <strong class="jxr_keyword">if</strong> (removed != <strong class="jxr_keyword">null</strong>) {
<a name="227" href="#227">227</a>             removed[0] = converters[index];
<a name="228" href="#228">228</a>         }
<a name="229" href="#229">229</a> 
<a name="230" href="#230">230</a>         <a href="../../../../org/goda/time/convert/Converter.html">Converter</a>[] copy = <strong class="jxr_keyword">new</strong> <a href="../../../../org/goda/time/convert/Converter.html">Converter</a>[length - 1];
<a name="231" href="#231">231</a>                 
<a name="232" href="#232">232</a>         <strong class="jxr_keyword">int</strong> j = 0;
<a name="233" href="#233">233</a>         <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i=0; i&lt;length; i++) {
<a name="234" href="#234">234</a>             <strong class="jxr_keyword">if</strong> (i != index) {
<a name="235" href="#235">235</a>                 copy[j++] = converters[i];
<a name="236" href="#236">236</a>             }
<a name="237" href="#237">237</a>         }
<a name="238" href="#238">238</a>         
<a name="239" href="#239">239</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../org/goda/time/convert/ConverterSet.html">ConverterSet</a>(copy);
<a name="240" href="#240">240</a>     }
<a name="241" href="#241">241</a> 
<a name="242" href="#242">242</a>     <em class="jxr_javadoccomment">/**</em>
<a name="243" href="#243">243</a> <em class="jxr_javadoccomment">     * Returns the closest matching converter for the given type, but not very</em>
<a name="244" href="#244">244</a> <em class="jxr_javadoccomment">     * efficiently.</em>
<a name="245" href="#245">245</a> <em class="jxr_javadoccomment">     */</em>
<a name="246" href="#246">246</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../org/goda/time/convert/Converter.html">Converter</a> selectSlow(<a href="../../../../org/goda/time/convert/ConverterSet.html">ConverterSet</a> set, Class type) {
<a name="247" href="#247">247</a>         <a href="../../../../org/goda/time/convert/Converter.html">Converter</a>[] converters = set.iConverters;
<a name="248" href="#248">248</a>         <strong class="jxr_keyword">int</strong> length = converters.length;
<a name="249" href="#249">249</a>         <a href="../../../../org/goda/time/convert/Converter.html">Converter</a> converter;
<a name="250" href="#250">250</a> 
<a name="251" href="#251">251</a>         <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i=length; --i&gt;=0; ) {
<a name="252" href="#252">252</a>             converter = converters[i];
<a name="253" href="#253">253</a>             Class supportedType = converter.getSupportedType();
<a name="254" href="#254">254</a> 
<a name="255" href="#255">255</a>             <strong class="jxr_keyword">if</strong> (supportedType == type) {
<a name="256" href="#256">256</a>                 <em class="jxr_comment">// Exact match.</em>
<a name="257" href="#257">257</a>                 <strong class="jxr_keyword">return</strong> converter;
<a name="258" href="#258">258</a>             }
<a name="259" href="#259">259</a>             <em class="jxr_comment">// BOGus change here TODO</em>
<a name="260" href="#260">260</a>             <strong class="jxr_keyword">if</strong> (supportedType == <strong class="jxr_keyword">null</strong> || (type != <strong class="jxr_keyword">null</strong> &amp;&amp; supportedType != type)) {
<a name="261" href="#261">261</a>                 <em class="jxr_comment">// Eliminate the impossible.</em>
<a name="262" href="#262">262</a>                 set = set.remove(i, <strong class="jxr_keyword">null</strong>);
<a name="263" href="#263">263</a>                 converters = set.iConverters;
<a name="264" href="#264">264</a>                 length = converters.length;
<a name="265" href="#265">265</a>             }
<a name="266" href="#266">266</a>         }
<a name="267" href="#267">267</a> 
<a name="268" href="#268">268</a>         <em class="jxr_comment">// Haven't found exact match, so check what remains in the set.</em>
<a name="269" href="#269">269</a> 
<a name="270" href="#270">270</a>         <strong class="jxr_keyword">if</strong> (type == <strong class="jxr_keyword">null</strong> || length == 0) {
<a name="271" href="#271">271</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a name="272" href="#272">272</a>         }
<a name="273" href="#273">273</a>         <strong class="jxr_keyword">if</strong> (length == 1) {
<a name="274" href="#274">274</a>             <em class="jxr_comment">// Found the one best match.</em>
<a name="275" href="#275">275</a>             <strong class="jxr_keyword">return</strong> converters[0];
<a name="276" href="#276">276</a>         }
<a name="277" href="#277">277</a> 
<a name="278" href="#278">278</a>         <em class="jxr_comment">// At this point, there exist multiple potential converters.</em>
<a name="279" href="#279">279</a> 
<a name="280" href="#280">280</a>         <em class="jxr_comment">// Eliminate supertypes.</em>
<a name="281" href="#281">281</a>         <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i=length; --i&gt;=0; ) {
<a name="282" href="#282">282</a>             converter = converters[i];
<a name="283" href="#283">283</a>             Class supportedType = converter.getSupportedType();
<a name="284" href="#284">284</a>             <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> j=length; --j&gt;=0; ) {
<a name="285" href="#285">285</a>                 
<a name="286" href="#286">286</a>                 <em class="jxr_comment">//Bogus change here TODO</em>
<a name="287" href="#287">287</a>                 <strong class="jxr_keyword">if</strong> (j != i &amp;&amp; converters[j].getSupportedType() == supportedType ) {
<a name="288" href="#288">288</a>                     <em class="jxr_comment">// Eliminate supertype.</em>
<a name="289" href="#289">289</a>                     set = set.remove(j, <strong class="jxr_keyword">null</strong>);
<a name="290" href="#290">290</a>                     converters = set.iConverters;
<a name="291" href="#291">291</a>                     length = converters.length;
<a name="292" href="#292">292</a>                     i = length - 1;
<a name="293" href="#293">293</a>                 }
<a name="294" href="#294">294</a>             }
<a name="295" href="#295">295</a>         }        
<a name="296" href="#296">296</a>         
<a name="297" href="#297">297</a>         <em class="jxr_comment">// Check what remains in the set.</em>
<a name="298" href="#298">298</a> 
<a name="299" href="#299">299</a>         <strong class="jxr_keyword">if</strong> (length == 1) {
<a name="300" href="#300">300</a>             <em class="jxr_comment">// Found the one best match.</em>
<a name="301" href="#301">301</a>             <strong class="jxr_keyword">return</strong> converters[0];
<a name="302" href="#302">302</a>         }
<a name="303" href="#303">303</a> 
<a name="304" href="#304">304</a>         <em class="jxr_comment">// Class c implements a, b {}</em>
<a name="305" href="#305">305</a>         <em class="jxr_comment">// Converters exist only for a and b. Which is better? Neither.</em>
<a name="306" href="#306">306</a> 
<a name="307" href="#307">307</a>         StringBuffer msg = <strong class="jxr_keyword">new</strong> StringBuffer();
<a name="308" href="#308">308</a>         msg.append(<span class="jxr_string">"Unable to find best converter for type \&quot;"</span>);
<a name="309" href="#309">309</a>         msg.append(type.getName());
<a name="310" href="#310">310</a>         msg.append(<span class="jxr_string">"\&quot; from remaining set: "</span>);
<a name="311" href="#311">311</a>         <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i=0; i&lt;length; i++) {
<a name="312" href="#312">312</a>             converter = converters[i];
<a name="313" href="#313">313</a>             Class supportedType = converter.getSupportedType();
<a name="314" href="#314">314</a> 
<a name="315" href="#315">315</a>             msg.append(converter.getClass().getName());
<a name="316" href="#316">316</a>             msg.append('[');
<a name="317" href="#317">317</a>             msg.append(supportedType == <strong class="jxr_keyword">null</strong> ? <strong class="jxr_keyword">null</strong> : supportedType.getName());
<a name="318" href="#318">318</a>             msg.append(<span class="jxr_string">"], "</span>);
<a name="319" href="#319">319</a>         }
<a name="320" href="#320">320</a> 
<a name="321" href="#321">321</a>         <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalStateException(msg.toString());
<a name="322" href="#322">322</a>     }
<a name="323" href="#323">323</a> 
<a name="324" href="#324">324</a>     <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../org/goda/time/convert/ConverterSet.html">Entry</a> {
<a name="325" href="#325">325</a>         <strong class="jxr_keyword">final</strong> Class iType;
<a name="326" href="#326">326</a>         <strong class="jxr_keyword">final</strong> <a href="../../../../org/goda/time/convert/Converter.html">Converter</a> iConverter;
<a name="327" href="#327">327</a> 
<a name="328" href="#328">328</a>         <a href="../../../../org/goda/time/convert/ConverterSet.html">Entry</a>(Class type, <a href="../../../../org/goda/time/convert/Converter.html">Converter</a> converter) {
<a name="329" href="#329">329</a>             iType = type;
<a name="330" href="#330">330</a>             iConverter = converter;
<a name="331" href="#331">331</a>         }
<a name="332" href="#332">332</a>     }
<a name="333" href="#333">333</a> 
<a name="334" href="#334">334</a> }
</pre>
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